After a bunch of debating.
In the Whispering Woods.
Entrapta zipped around drawing symbols on the ground and placing candles.
"Ooooohhhhhh, I'm so excited!" Entrapta squealed. "We can summon a creature from an unknown world, maybe another universe! Imagine all the data I'll collect. I wonder if it'll let me dissect it after we're done?"
"Can we just like, get this over with?" Mermista mooded.
They had already chosen who would summon the creature. Adora stepped forward.
"Remember, you have to make a deal right after you summon it," Entrapta said.
"Do you really have to do this? Remember the portal?" Catra warned.
"Hey, I'm She-Ra, what could go wrong?" Adora said.
"I can think of a few things," Catra muttered too low for Adora to hear.
"Everyone ready?!" Entrapta cried.
"I'm good to go," said Adora.
"OK, start!"
It looks like you're currently enrolled in multiple classroom sessions, which may limit which websites you can visit.
Adora unfolded a piece of paper and began to read it aloud.
"Triangulum, Entangulum. Meteforis Dominus Ventium. Meteforis Venetisorium!"
...
Pain.
Adora screamed in agony as electric spasms ripped through her body. A wall of solid air pushed everybody away from her and the circle. Unbidden, more words came out of Adora's mouth.
"Egassem sdrawkcab, egassem sdrawkcab, egassem sdrawkcab, egassen sdrawkcab, EGASSEM SDRAWKCAB!"
The words made no sense to Adora but they worked because as the pain faded she looked up to see a small triangular portal opening up into space. Laughter rang through the air, seeming to have no origin point. Faintly Adora knew she should transform but she was still recovering from the ordeal. A single cat-like eye opened from the portal and suddenly it reformed into a shadowy human figure.
The thing spoke.
"Oh, oh, Dimension SRPP2 it is good to be back."
The shadows surrounding the thing dispelled to reveal a handsome young-looking man. The man had one eye; the other was covered by a triangular eye-patch. He wore a yellow vest over a black suit. His pants were also yellow and he wore black boots. A black bow-tie and top hat topped it all off.
"Name's Bill Cipher and I take it you're some kind of living reboot of an old kids show? He he. I'm just kidding I know who you are Adora."
Adora, now fully recovered, looked up at him in confusion.
Catra ran over as soon as the barrier dispelled and immediately entered protective girlfriend mode.
"What are you? How do you know her name?" Catra demanded.
"Oh, I know lots of things Catra," Bill's eye began to project images, some of them all too familiar. "Lots of things... Hey look what I can do."
Bill twitched his finger and a clattering sound came from nearby. They looked over and saw a magic deer's teeth being painlessly pulled out by an unseen force. They flew to Bill's hand and he held them out and dropped them into Catra's.
"Here ya go, deer teeth, for you kid, hehehehehehe!"
Catra dropped them in disgust.
"What the - you're insane!" she accused
"Sure I am, what's your point?"
Bill swirled his finger and the teeth flew right back into place as if they'd never left. The deer ran away confused. A single bead of sweat dripped down Bill's face.
"Faaaaaaaascinating..."
Entrapta had crept up to Bill and in a split second, had him rapped in her hair, tools surrounding him.
Bill floated higher into the air until Entrapta let go.
"Oh, great," he said dryly. "I can tell it's going to be a fun time here."
Adora finished soothing Catra and stepped forward.
"I believe I summoned you for a reason." It wasn't a question.
"Can you call off your living hair demon first?" he asked.
Perfuma walked up and tied a vine rope around Entrapta, dragging her away.
"But it's for science!" she wailed.
"Thanks. That was uncomfortable," Bill said. "Anyway, I could stay here rambling, but the author is about to get writers block, so lets get right to it. Again, I'm Bill Cipher and I'm an inter-dimensional dream d- wanderer who makes deals. How may I serve you?"
"We need your help," Adora said. "We heard that you're a tactical genius and we could really use one of those right now."
"Ok, I can get with that."
"Great! Ok, so we're -"
"Whoa, hold on Muscle Girl, before we can begin I need something from you."
"Yes?" Adora said warily.
"I need..."
"Go on."
"A way home."
"That's crazy I would never-," Adora started. "wait, what?"
"For an eternity I've been wandering the Multiverse, summoned by millions of people. I'm sick of it. I just want to go home and live out the rest of my long life in peace." Bill explained. "If I help you end your war you build me an inter-dimensional portal.
"Oh," Adora said surprised. "OK. Well then, I agree."
She stuck out her hand.
Bill raised his own and blue fire flared into existence.
"It's a deal!"
They shook.
Ha ha cliffhanger. And yes I used humanoid Bill.